Welcome from ND Rich.
I am a single Dad with two boys and have a #3 and would not want to go smaller. So, I think you have made a great choice.
According to the website, the #3s and #4s are supposed to be in stock today (3/9/2015). So, you may want to call Steve at 260-417-9951 to verify. The site, is still preventing you from adding a #3 to your cart, but that could be just a website delay. I would give Steve a call.
Let us know if you have any questions.